Siemens Building Technology QFA3212.EWNN Sensor
The Siemens Building Technology QFA3212.EWNN Sensor is a precision-engineered room relative humidity and temperature sensor designed for demanding commercial HVACR applications. Built for high-traffic environments where tamper-resistance is a priority, this no-display (blank front) unit provides reliable environmental monitoring without the risk of unauthorized adjustments. It utilizes a capacitive polymer sensing element for humidity and a 1k Ohm Platinum RTD (385 alpha) for temperature, ensuring highly accurate data acquisition for your building automation system. The device supports a selectable 0-10Vdc or 4-20mA output signal for humidity, offering maximum versatility when integrating with generic or proprietary controllers. Designed for streamlined field mounting on standard 2x4 electrical boxes, its terminal block connections and no-logo design make it an ideal choice for clean rooms, hospitals, and office buildings requiring a low-profile, professional finish.
- Selectable Analog Outputs: Field-selectable 0-10Vdc or 4-20mA humidity signals provide universal compatibility with diverse Building Automation Systems (BAS).
- High-Precision Temperature Sensing: Features a 1k Ohm Platinum RTD (385 alpha) for stable, long-term temperature measurement performance.
- Tamper-Resistant Design: The blank front (EWNN) configuration lacks a display and logo, preventing tampering in public or high-traffic areas.
- Optimized Airflow Housing: Strategically placed ventilation slots in the room humidity sensor housing maximize response time and accuracy.
- Standardized Installation: Includes all necessary hardware for quick mounting on 2x4 electrical boxes or directly to drywall via anchors.
Is the humidity range adjustable on this model?
The QFA3212.EWNN provides a fixed measuring range of 0-100% relative humidity, delivering a linear proportional signal across the selected output range.
What power supply is required for operation?
This sensor operates on a standard 24 Vac or 18-36 Vdc power supply, making it compatible with most commercial HVAC control circuits.
Does this unit include a local display for field checks?
No, the EWNN model is a sensing-only unit with a blank front. For applications requiring a local interface, the QFA3212.FWNN series should be specified.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Shipping & Returns
Description
The Siemens Building Technology QFA3212.EWNN Sensor is a precision-engineered room relative humidity and temperature sensor designed for demanding commercial HVACR applications. Built for high-traffic environments where tamper-resistance is a priority, this no-display (blank front) unit provides reliable environmental monitoring without the risk of unauthorized adjustments. It utilizes a capacitive polymer sensing element for humidity and a 1k Ohm Platinum RTD (385 alpha) for temperature, ensuring highly accurate data acquisition for your building automation system. The device supports a selectable 0-10Vdc or 4-20mA output signal for humidity, offering maximum versatility when integrating with generic or proprietary controllers. Designed for streamlined field mounting on standard 2x4 electrical boxes, its terminal block connections and no-logo design make it an ideal choice for clean rooms, hospitals, and office buildings requiring a low-profile, professional finish.
- Selectable Analog Outputs: Field-selectable 0-10Vdc or 4-20mA humidity signals provide universal compatibility with diverse Building Automation Systems (BAS).
- High-Precision Temperature Sensing: Features a 1k Ohm Platinum RTD (385 alpha) for stable, long-term temperature measurement performance.
- Tamper-Resistant Design: The blank front (EWNN) configuration lacks a display and logo, preventing tampering in public or high-traffic areas.
- Optimized Airflow Housing: Strategically placed ventilation slots in the room humidity sensor housing maximize response time and accuracy.
- Standardized Installation: Includes all necessary hardware for quick mounting on 2x4 electrical boxes or directly to drywall via anchors.
Is the humidity range adjustable on this model?
The QFA3212.EWNN provides a fixed measuring range of 0-100% relative humidity, delivering a linear proportional signal across the selected output range.
What power supply is required for operation?
This sensor operates on a standard 24 Vac or 18-36 Vdc power supply, making it compatible with most commercial HVAC control circuits.
Does this unit include a local display for field checks?
No, the EWNN model is a sensing-only unit with a blank front. For applications requiring a local interface, the QFA3212.FWNN series should be specified.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
